Preparation of an N-sec-alkyl 2,6-disubstituted aniline: a key intermediate in the divergent synthesis of S-Metolachlor metabolites
作者:Sameer Tyagi、Moses G. Gichinga、Christopher D. Cook、Jeffrey A. Key、Bruce P. McKillican、William J. Eberle、Timothy J. Carlin、David A. Hunt、Alan J. Dowling
DOI:10.1016/j.tetlet.2016.10.077
日期:2016.11
A simple method to prepare a 2,6-disubstituted aniline containing a N-sec-alkyl group and a carbonyl on one ortho substituent is reported. This method was used to accomplish the first synthesis of side chain oxidized ethylsulfonic acid (ESA) and oxanilic acid (OXA) metabolites of S-Metolachlor (S-Moc) herbicide. The 2,6-disubstituted aniline functionality was installed by a Sugasawa reaction of readily
一种简单的方法来制备含有一个2,6-二取代苯胺ñ -仲-烷基并且在一个羰基邻位取代基的报道。使用该方法来完成侧链的第一合成氧化乙基磺酸(ESA)和oxanilic酸(OXA)代谢物小号异丙甲草胺(小号-Moc)除草剂。通过容易获得的邻甲苯胺的Sugasawa反应来安装2,6-二取代的苯胺官能度。的Ñ -秒烷基是通过烷基活化的2-乙酰基-6-甲基取代的苯胺的Mitsunobu烷基化引入的。该关键步骤使得能够获得关键的2,6-二取代的苯胺中间体,该中间体用于S -Moc代谢产物的合成。使用钌催化的氧化反应,从羟基-ESA代谢物一步完成了酮-ESA代谢物的生物启发性合成。 下载:下载全图